I'm a newbie in Aura Components and LWC. I was scrolling through the specifications <ui:inputText/> (https://developer.salesforce.com/docs/component-library/bundle/ui:inputText/specification) and <lightning-input></lightning-input> (https://developer.salesforce.com/docs/component-library/bundle/lightning-input/specification) but I can not find the onchange or keyup methods, although they are being used as I found here for example:
<ui:inputText aura:id="lookup-field"class="slds-input slds-combobox__input slds-input-has-icon_left"
updateOn="keyup"
value="{!v.searchText}"
keyup="{!c.onKeyUp}"
placeholder="{!'Search ' + v.objectLabelPlural + '...'}"
blur="{!c.onBlur}"
focus="{!c.onFocus}"
disabled = "{!v.disabled}"
/>
What is the reason behind the keyup or onchange event attributes missing in the specifications?